UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

(Rule 14a-101)

SCHEDULE 14A INFORMATION

Proxy Statement Pursuant to Section 14(a) of the

Securities Exchange Act of 1934

Filed by the Registrant  x                             Filed by a Party other than the Registrant  ¨

Check the appropriate box:

¨ Preliminary Proxy Statement

¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

¨ Definitive Proxy Statement

x Definitive Additional Materials

¨ Soliciting Material Pursuant to §240.14a-12

EXTREME NETWORKS, INC.

(Name of Registrant as Specified In Its Charter)

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of Filing Fee (Check the appropriate box):

x	No fee required.
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*** Exercise Your Right to Vote ***

Important Notice Regarding the Availability of Proxy Materials for the

Shareholder Meeting to Be Held on November 12, 2014

EXTREME NETWORKS, INC.

EXTREME NETWORKS, INC.

145 RIO ROBLES

SAN JOSE, CA 95134

Meeting Information

Meeting Type: Annual Meeting

For holders as of: September 17, 2014

Date: November 12, 2014 Time: 8:00 AM PST

Location: 145 Rio Robles

San Jose, CA 95134

You are receiving this communication because you hold shares in the above named company.

This is not a ballot. You cannot use this notice to vote these shares. This communication presents only an overview of the more complete proxy materials that are available to you on the Internet. You may view the proxy materials online at www.proxyvote.com or easily request a paper copy (see reverse side).

We encourage you to access and review all of the important information contained in the proxy materials before voting.

See the reverse side of this notice to obtain proxy materials and voting instructions.

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Before You Vote

How to Access the Proxy Materials

Proxy Materials Available to VIEW or RECEIVE:

1. Notice & Proxy Statement 2. Annual Report

How to View Online:

Have the information that is printed in the box marked by the arrow XXXX XXXX XXXX (located on the following page) and visit: www.proxyvote.com.

How to Request and Receive a PAPER or E-MAIL Copy:

If you want to receive a paper or e-mail copy of these documents, you must request one. There is NO charge for requesting a copy. Please choose one of the following methods to make your request:

1) BY INTERNET: www.proxyvote.com

2) BY TELEPHONE: 1-800-579-1639

3) BY E-MAIL*: sendmaterial@proxyvote.com

* If requesting materials by e-mail, please send a blank e-mail with the information that is printed in the box marked by the arrow XXXX XXXX XXXX (located on the following page) in the subject line.

Requests, instructions and other inquiries sent to this e-mail address will NOT be forwarded to your investment advisor. Please make the request as instructed above on or before October 29, 2014 to facilitate timely delivery.

How To Vote

Please Choose One of the Following Voting Methods

Vote In Person: Many shareholder meetings have attendance requirements including, but not limited to, the possession of an attendance ticket issued by the entity holding the meeting. Please check the meeting materials for any special requirements for meeting attendance. At the meeting, you will need to request a ballot to vote these shares.

Vote By Internet: To vote now by Internet, go to www.proxyvote.com. Have the information that is printed in the box marked by the arrow XXXX XXXX XXXX available and follow the instructions.

Vote By Mail: You can vote by mail by requesting a paper copy of the materials, which will include a proxy card.

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Voting items

The Board of Directors recommends you vote FOR the following:

1. Election of Directors

Nominees

01 Charles W. Berger 02 Charles Carinalli 03 Edward H. Kennedy 04 John H. Kispert 05 Edward B. Meyercord III

06 Randi Paikoff-Feigin 07 John C. Shoemaker

The Board of Directors recommends you vote FOR proposals 2, 3, 4, and 5.

2. To approve a non-binding advisory resolution regarding executive compensation.

3. To ratify the appointment of KPMG LLP, independent registered public accounting firm, as Extreme Networks, Inc.’s independent auditors for the fiscal year ending June 30, 2015.

4. Advisory vote to ratify the extension of the term of the Amended and Restated Shareholder Rights Plan to May 31, 2015.

5. To approve the adoption of the Extreme Networks, Inc.’s. 2014 Employee Stock Purchase Plan and to authorize an aggregate of 12 million shares issuable under the plan.

NOTE: Such other business as may properly come before the meeting or any adjournment thereof.

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